SM5906AF

SM5906AF NIPPON PRECISION CIRCUITS INC. Shock-proof Memory Controller for Video CD Players Overview The SM5906AF is a shock-proof memory controller LSI for video CD players. The operating mode can be set to CD-DA mode, V-CD mode, or Super V-CD mode, and external memory can be selected from 2 options (4M, 16M). It operates from a 2.7 to 3.6 V supply voltage range. Features – 2-channel processing – Serial data input 2s complement, 16-bit/MSB first Right-justified format Wide capture function (up to 4 × speed input rate) Selectable 16/24/32-bit clock – System clock input 384fs (16.9344 MHz) – Shock-proof memory controller Selectable CD-DA/V-CD/SVC mode 2 external DRAM configurations selectable 1 × 16M DRAM (4M × 4 bits, refresh cycle = 2048 cycle) 1 × 4M DRAM (1M × 4 bits) – Microcontroller interface Serial command write and status read-out Data residual detector: 11-bit operation, 16-bit output (Bits 13 to 15 bit are fixed LOW.) Forced mute – Extension I/O Microcontroller interface for external control using 3 extension I/O pins – +2.7 to +3.6 V operating voltage range – Schmitt inputs All input pins (including I/O pins) except CLK (system clock) – Reset signal noise elimination Approximately 3.8 µs or longer (65 system clock pulses) continuous LOW-level reset - 48-pin QFP package (0.5 mm pin pitch) Pinout (Top View) YMCLK 27 YMDATA 26 NCAS 36 35 34 33 32 31 30 29 28 NRAS NWE VSS3 A10 D1 D0 D3 D2 Ordering Information SM5906AF 48pin QF...